Engineering Worksheet: Part 2 Test

Engineering lesson 16: Part 2 test: forces and machines · Set 588 · 40 questions

Engineer's tip (Find the topic, use the idea): Find the topic: force, friction, machine, lever class, balance, pulley or work. Use that lesson’s rule — what is in the middle, load × distance = effort × distance, effort = load ÷ ropes, work = force × distance. Write the calculation before you answer.

1. 1.⚖️ Going along a lever from one end to the other, the order is: fulcrum, effort, load. Which class of lever is it? (a) class 1 (b) class 3 (c) class 2
2. 2.🏋️ A 13 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
3. 3.Which of these is caused by gravity? (a) brakes stop a bicycle (b) a rolling ball slows (c) a thrown ball comes down (d) a magnet picks up pins
4. 4.💪 Is pushing a swing a push or a pull? (a) a pull (b) a push
5. 5.🏋️ A force of 250 N pushes a cart 2 m along the floor. How much work is done, in joules?
6. 6.⚖️ Along a straight bar, measured from the left end, the effort is at 30 cm, the fulcrum at 10 cm and the load at 0 cm. Which class of lever is it? (a) class 3 (b) class 1 (c) class 2
7. 7.🛞 More or less friction: a box pushed on carpet? (a) more friction (b) less friction
8. 8.⚖️ Which class of lever is a nutcracker? (a) class 2 (b) class 3 (c) class 1
9. 9.💪 A bag has a mass of 49 kg. Taking 1 kg to weigh about 10 N, what is its weight in newtons?
10. 10.True or false: skating on ice gives more friction. (a) False (b) True
11. 11.⚖️ Along a straight bar, measured from the left end, the effort is at 10 cm, the fulcrum at 50 cm and the load at 40 cm. Which class of lever is it? (a) class 2 (b) class 1 (c) class 3
12. 12.🪝 A pulley system lifts a 500 N load with an effort of 250 N. What is its mechanical advantage (MA)?
13. 13.🛞 Rubbing your hands fast makes them … (a) cold (b) warm (c) magnetic (d) wet
14. 14.🏋️ A force of 110 N pushes a cart 1 m along the floor. How much work is done, in joules?
15. 15.🏋️ A 2 kg box is lifted straight up by 1 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
16. 16.🪝 A wheel and axle is a big wheel fixed to … (a) a smaller rod (axle) (b) a flat ramp (c) a sharp wedge (d) a loose rope
17. 17.True or false: a nutcracker is a screw. (a) True (b) False
18. 18.💪 Two equal forces push on a box from opposite sides. They are … (a) doubled (b) gravity (c) balanced (d) unbalanced
19. 19.🛞 Friction acts … (a) only on ice (b) only upwards (c) against the motion (d) with the motion
20. 20.⚖️ A seesaw balances. Meena (? N) sits 2 m from the pivot on one side; Arjun (380 N) sits 3 m from the pivot on the other side. What is the missing weight in newtons?
21. 21.True or false: a nut and bolt is a screw. (a) False (b) True
22. 22.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: a glass sheet 1 N, a wooden plank 3 N, a carpet 6 N, sandpaper 7 N. Which surface gave the least friction? (a) a glass sheet (b) sandpaper (c) a carpet (d) a wooden plank
23. 23.🏋️ An 11 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
24. 24.🏋️ Pushing a crate 2 m took 460 J of work. What force was used, in newtons?
25. 25.💪 Is closing a drawer a push or a pull? (a) a pull (b) a push
26. 26.⚖️ A seesaw balances. Meena (280 N) sits ? m from the pivot on one side; Kabir (280 N) sits 2 m from the pivot on the other side. What is the missing distance in metres?
27. 27.🏋️ Work is done when a force moves something … (a) only upwards (b) through a distance (c) without moving it (d) very slowly
28. 28.🛞 Is friction helpful or a problem here: dragging a heavy box? (a) a problem (b) helpful
29. 29.⚖️ A lever balances when … (a) turning effects match (b) the bar is short (c) the fulcrum moves (d) both weights are equal
30. 30.Which of these is a wheel and axle? (a) a crane hook block (b) a wheelchair ramp (c) a jar lid (d) a water tap handle
31. 31.💪 A cart is pulled to the right with 75 N and to the left with 75 N. Which way does the net force act? (a) no net force (b) to the right (c) to the left
32. 32.⚖️ A seesaw balances. Kabir (760 N) sits 1 m from the pivot on one side; Asha (190 N) sits ? m from the pivot on the other side. What is the missing distance in metres?
33. 33.True or false: a playground slide is a wedge. (a) False (b) True
34. 34.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
35. 35.⚙️ Which simple machine is a road up a hill? (a) inclined plane (b) lever (c) wheel and axle (d) pulley
36. 36.🪝 A pulley system has 4 rope sections holding up the load. To lift the load by 3 m, how many metres of rope must you pull?
37. 37.💪 Is plucking a mango a push or a pull? (a) a pull (b) a push
38. 38.🛞 The same block is pulled at a steady speed across four surfaces. The forces needed were: ice 4 N, a glass sheet 8 N, a wooden plank 10 N, a carpet 13 N. Which surface gave the most friction? (a) ice (b) a glass sheet (c) a wooden plank (d) a carpet
39. 39.🪝 What does a single fixed pulley change? (a) the direction of pull (b) the size of the load (c) gravity (d) the colour of rope
40. 40.🏋️ A force of 270 N pushes a cart 2 m along the floor. How much work is done, in joules?

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